Committed r4627m which fixed the bug where the sliders were not set to their initial values by adding syncSliders() to constructor in SwingNumberWidget.
Next step is to make the B & C values go from -100 to +100 (not 0 to 255).

We need to make the interactive B&C command call plugins to accomplish it's tasks. We could make the Auto button call an AutoMinMax command of some sort that takes a double param for percent to exclude or some such. The B&C command would determine the percents to pass to the plugin. It would duplicate IJ1's wrapping behavior on multiple clicks of the Auto button. It might not use EnhanceConstrast though. But we can try to grab as much IJ1 code as possible.